Title:
デジタルオーディオ信号の変換及び変換されたデジタルオーディオ信号の逆変換の方法並びに装置
Document Type and Number:
Japanese Patent JP4729505
Kind Code:
B2
Abstract:
A known time domain to frequency domain or frequency domain to time domain transform used in audio codecs is MDCT, which has the disadvantage of being costly in terms of required computational power due to high-precision multiplications, but which facilitates overlapping transform and subsampling. The invention uses a transform or inverse transform which does not involve multiplications because the transform and inverse transform matrices include '+1' and '-1' values only, but whereby the advantages of overlapping and subsampling are kept.
Inventors:
Baom, Peter Georg
Application Number:
JP2006553480A
Publication Date:
July 20, 2011
Filing Date:
February 04, 2005
Export Citation:
Assignee:
Thomson Licensing
International Classes:
G06F17/14; G10L19/16; H03M7/30
Domestic Patent References:
| JP2002526798A | ||||
| JP2113300A |
Foreign References:
| US6137824 |
Other References:
HAKAN CAGLAR, SINAN GUNTURK, EMIN ANARIM, BULENT SANUR,Permutation Based Design of Orhtogonal Block Transform and Filter Banks,MULTIDIMENSIONAL SYSTEM AND SIGNAL PROCESSING,米国,2001年,N12,P63-79
Attorney, Agent or Firm:
Tadahiko Ito
Shinsuke Onuki
Tadashige Ito
Osamu Miyazaki
Shinsuke Onuki
Tadashige Ito
Osamu Miyazaki